Push-button.



PATENTED SEPT. 17, 1907.

G. H. MEBOLD. PUSH BUTTON.

APPLICATION FILED MAR. 16,1907.

UNITED STATES PATENT OFFICE.

GEORGE MEBOLD, OF NEW YORK, N. Y.

rUsn B UTToN.

Specification of Letters Patent.

Patented Sept. 17, 1907.

Application filed March 16,1907. Serial No- 862,686.

To all whom it may concern:

Be it known that I, GEORGE H. MEBOLD, a citizen of the United States, residing in New York, in the borough of Queens and State of New York, have invented certain new and useful Improvements in Push-Buttons, of which the following is a specification.

This invention relates to an improved push-button for electrical bell and other circuits, and it consists of elevation of the insulated base-plate and metallic contact-plates, with the push-button and easing removed, and Fig. is a vertical transverse section on line 3, 3,. Fig. 1. I

Similar letters of reference indicate corresponding parts. I

Referring to the drawings, a represents the base-plate of my improved push-button. The base-plate a is made of hard rubber or other insulating material and in the shape of a disk and provided with openings 0 for the conducting-wires w. To the base-plate are attached, by means of fastening-screws, flat metallic contact-plates e, which are preferably made of T- shape, the inner portions of'the plates extending towardseach other. Over'the base-plate a extends a circular casing c, which has a circular opening at the center that serves for guiding a button b, which is provided at its inner end with a cylindricaleavity for receiving a helical spring d by which a shoulder b on the push-button is held against the edge of the opening of the casing c. The opposite end of the spring d is seated in a depression gin the base-plate a. The casing c is attached by screws 0 to the wall or other support. The inner end of the push-button b is pro- -vided with a metallic rim r of angular cross-section,

which forms contact with the metallic plates 2 whenever the push-button is pushed inwardly against the tension of the spring, said rim forming contact with the inner ends of both contact-plates and producing thereby the reliable closing of the circuit. As soon as the pressure is removed, the button is returned to its former position, so that the contact between its rim and the contact-plates is interrupted and thereby the electric circuit broken.

The insulated base-plate is attached in any suitable mannerto the wall or other support where the pushbutton is to be used. The push-button is, owing to its simple construction, comparatively inexpensive,

while it is reliable in use owing to the full contact produced by the rim of the push-button with the contactplates.

Having thus described my invention, 1' claim as new and desire to secure by Letters Patent:

A push-button for electric circuits, consisting of an insulated base-plate, T-shaped contact-plates attached to the base-plate and extending radially towards each other, a casing extending over the base-plate and provided with a central opening, a push-button fitting in said opening and provided with a shoulder and an interior metallic rim, said rim being adapted to be placed in contact with the inner ends of the contact-plates, and a helical spring intel-posed between the base-plate and a cavity in the interior. of the button.

In testimony, that I claim the foregoing as my inven- 

